bueekel



(No Model.)

B. JOHNSON & J. 1-". BUERKEL.

HEATER. w

Patented June 12, 1883.

UNITED STATES PATENT OFFICE.

ROBERT JOHNSON AND JOHN F. BUERKEL, OF BOSTON, MASS., ASSIGNORS TO THE JOHNSON RAILWAY HEATER COMPANY, OF SAME PLACE.

HEATE-R.

SPECIFICATION forming part of Letters Patent No, 279,486, dated' June 12, 1883,

Application filed September 28, 1882. (No model.)

To all whom it may concern Be it known that we, ROBERT JoHNsoN and JOHN F. BUERKEL, of Boston, Suffolk county, Massachusetts, have invented Improvements in Heaters, of which the following is the specification.

Our invention is an improvement in that class of railway-car heaters in which the water, glycerine, or any of the usual fluids is circu- 1o lated without pressure or at a nominal press ure, as in the heater patented to Jonathan Johnson, February 7, 1882 5 and our invention has for its object to secure a rapid circulation and facilitate the speedy heating of the car I 5 after the fire is kindled, while permitting the automatic feeding from a large tank to supply any loss from evaporation or leakage.

The drawing represents in vertical trans verse section a passenger-car.with one of our improved heaters, similar in many respects to that shownin the aforesaid Letters Patent.

A is the heater or stove, of any suitable form and construction.

E is the supplychamber, and-O the circulatingchamber, both, in this instance, con

tained in one tank, F.

a is the water-gage 011 either tank or chamber.

D is the condenser, communicating with the chamber 0 through a pipe, 6.

In the before-named patented heater the water circulated from the coils and stove through the chamber 0, and would become rapidly heated after kindling the fire; but in- 3 5 jury was liable to result from the evaporation of the small body of water in the chamber 0 should the attendant neglect to turn on in time a proper supply from the chamber E. This injury could be prevented by circulating the 7 water through the larger chamber; but the time requisite to heat so large a body of fluid would delay the heating of the car. To avoid both of these objections, we circulate the water from the stove and the coils through the chamber O, the pipe 0 from the furnace or 5 stove, and pipe f from the coils leading to said chamber, and we put the chamber E into separate communication with the heating-pipes by means of a pipe, 7:. The water will, in heating, thus circulate through the limited cham- 5o ber O, and the entire body will speedily reach the required temperature; but any loss from evaporation or leakage will be automatically supplied from the chamber E, so that the water in both chambers is maintained at the same level. We thus secure the advantage of a large body of water in constant communication with the pipes, andthe advantage resulting from circulating through a small chamber and heating only a small body of water where the fire is started.

We claim The combination, in a hot-water heating apparatus, of a limited circulating-chamber ar ranged outside the heater, open to the external atmosphere, and communicating both with the water-pipes in the stove and with the radiating pipes or coils, and an independent larger supply-chamber communicating with the heating or circulating pipes, whereby the water is circulated through the coils and small chamber without pressure and all loss from evaporation supplied from the larger chamber, as set forth.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ROBERT JOHNSON,

JOHN F. BUERKEL.

Witnesses:

GEO. S. LORING, J mvrns E. STONE. 

